Gr5 Titanium Countersunk Head Bolts for Motorcycle and Bicycle
Key Features
● Flush Fit
Titanium countersunk head bolts sit perfectly flush, eliminating protrusions and preventing airflow disruption. This design ensures smooth aerodynamic performance and clean visual lines on exposed panels.
● Stable Countersunk Clamping
The thin countersunk head maintains firm clamping without adding height. Its geometry keeps panels from loosening under vibration and helps retain a clean, embedded appearance.
● Embedded Head
Recessed into the panel, the bolt head reduces wind drag and local surface turbulence. titanium countersunk head bolts maintain stability, flush installation, and seamless aesthetics for fairings and covers.
● Precision Countersink
The 82°–90° countersunk angle distributes load evenly across thin panels and transparent housings, preventing stress concentrations and panel deformation, ideal for lightweight plastics or sheet metal.
● Protected Seating Edge
The seated countersink area resists staining and edge wear during long-term outdoor use, keeping the contact surface smooth and preventing marks around the flush interface.
Installation & Maintenance Guidance
● When positioning the bolt, start threading it by hand so the countersunk head settles flush before applying full torque with tools.
● Check whether the panel holes and seating surfaces are flat and free of burrs; uneven edges will affect fit of the countersunk screws.
● For exterior mounting points, we recommend checking the torque and surface condition annually to keep the flush interface secure.
Technical Specifications
1. Material & Mechanical Properties
| Parameter | Details |
| Material | Grade 5 Titanium (Ti-6Al-4V) |
| Density | 4.43 g/cm³ |
| Tensile Strength | ≥ 900 MPa |
| Yield Strength | ≥ 830 MPa |
| Hardness | 34–36 HRC |
| Corrosion Resistance | Excellent (moisture, salt, mild chemicals) |
| Standards Compliance | DIN 7991 / ISO 10642 (Countersunk Head) |
2. Dimensional & Thread Data
| Parameter | Details |
| Diameter Range | M5–M8 |
| Length Range | 10–25 mm |
| Thread Pitch | 0.8–1.25 mm |
| Thread Type | Metric Coarse / Fine |
| Drive Type | Hex Socket (internal) |
| Tolerance | ISO 6g (external threads) |
3. Finishing & Customization Options
| Parameter | Details |
| Surface Finish | Natural Titanium / Polished / Anodized / PVD Coating |
| Logo Engraving | Available |
| Packaging | Bulk cartons / Custom retail sets |
| OEM Customization | Supported (thread type, head style, finish, length) |
Application Scenarios
● Motorcycle Panels & Covers
Fairings, Side Panels & Body Covers
For flush installation on exterior motorcycle panels, titanium countersunk head bolts keep the surface level and reduce visible protrusion（M6 × 12–20 mm）. This helps the fairings and side covers maintain smooth airflow and a consistent appearance across connected body sections.
Wind Deflectors & Instrument Housings
These bolts secure wind deflectors and instrument housings while keeping the mounting surface flush to the panel. Their vibration resistance supports stable attachment at higher speeds（M6–M8 × 15–25 mm）, and torque can be adjusted based on panel thickness.
Side Covers & Dash Panels
Countersunk heads sit cleanly within dashboards and side covers, preventing snagging and keeping the panel surface visually tidy（M5–M6 × 10–20 mm）. The load spreads evenly across thin sections, helping the panels hold shape during long-term use.
● Bicycle Lightweight Panels & Accessories
Enclosures, Guards & Display Mounts
Titanium countersunk head bolts provide a flush, secure fit for thin bicycle panels, guards, and transparent housings（M5 × 10–15 mm）. They help reduce concentrated stress, preserve lightweight construction, and keep the edges and surfaces visually clean.
Frequently Asked Questions
Q1. Why are titanium countersunk head bolts suitable for motorcycle and bicycle visible components?
A: Titanium countersunk head bolts provide a clean and flush installation appearance. The low-profile head design is suitable for visible parts such as motorcycle fairings, covers, brackets, and bicycle components. They are often selected when both lightweight performance and appearance are important.
Q2. What should be considered when installing countersunk head bolts?
A: Countersunk head bolts require a properly prepared countersunk hole for correct installation. The hole angle and surface condition should match the bolt head design. Proper fitting helps the bolt sit evenly and maintain reliable clamping performance.
Q3. Can these bolts be customized for specific projects?
A: Yes. Custom options are available for different project requirements. They may include thread specifications, dimensions, and surface finishes. This allows motorcycle builders, bicycle brands, and OEM customers to select suitable fasteners for their applications.
